import java.util.*;
import java.util.stream.Collectors;

public class Test {


    public static void main(String[] args) {
        extracted();
    }

    private static void extracted() {
        Map<Integer,Integer> map = new HashMap<>();
        List<Integer> list = Arrays.asList(1,2,3,4,5,11,12,30,7,120,null);
        System.out.println(list);
//        testParam(list);
        List<Integer> collect = list.stream().collect(Collectors.toList());
        System.out.println(collect == list);

        System.out.println(list.contains(null));


        System.out.println(list);
    }


    public static void testParam(List<Integer> list){

        List<Integer> collect = list.stream().filter(x -> x > 10).collect(Collectors.toList());


    }


    public String getHello(){
        return "hello world!";
    }


}
